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NJETERS. PHQTO`LITNOGRAPHER WASHINGTON D C *r iuiinl VDELOSS A. DANFORTH, OF ELKI-IART, INDIANA, ASSIGNOR TO HIM- SELF AND A. N. CHAMBERLAIN, OF SAME PLACE.

Lette/rs Patent No. 89,205, dated April 20, 1869.

IMPROVENIENT IN BASE-OPERATOR.

The Schedule referred to in there Letters Patent and making part of tirannia.

To all whom 'it ma/y conce/rn:

Be it known that I, DELoss A. DANFORTH, of Elkhart, in the countyof Elkhart, and State of Indiana, have invented certain new and useful Improvements in WindowSash Operators and Fasteners; and I do hereby declare that the :following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specication, and to the letters of reference marked thereon, like letters indica-ting like parts, wherever they occur.

To enable others skilled in the art to construct and use my invention, I will proceed to describe it.

My invention relates to a peculiar arrangement of devicesl for operating and fastening window-sash, and consistsin attaching to the upper sasha vertical rack, and to the lower sash a disk, having formed on its face a spiral thread, that engages with said rack, the disk being mounted in such manner as to be revolved by a crank; and also in supporting the upper sash by a pivoted hook, operated by a cord, so that` thev sash may be instantly released, when it is desired to lower it, but' that it will be automatically fastened upon being brought up in place.

Figure 1 is a vertical cross-section through the centre of a window, having my -device attached; l

Figure-2, a cross-section of the rack on the line fc a: of g. 1;

Figure 3, a faceview of the threaded disk;

Figure 4, a vertical section through the middle of a window, provided with a modified form of my device,

in which a rack and cog-pinion are used, instead of the disk;

Figure 5, an enlarged view of the pinion and its supports as used in the modication;

Figure 6, a cross-section oi the rack used in the moditication, taken on the line y y of iig. 4; and

Figure 7, a perspective View of a window, having my device applied.

A represents the upper, and

B, the lower sash, the former having secured to it,

on the inside at the middle, the rack C, provided, at

its upper end, with an inclined head, or hook, j'.

Secured to the upper side of the window-frame is a pivoted, or hinged catch, I, also formed with a bevelled face, and on its back connected with a cord, "i, passing np through a staple in the frame, and hanging down in front of the sash, and having attached to its lower end a tassel, all as shown in Iig. l.

This catch is so located as to catch over the hook f, when the sash is brought to the required height, and thus hold it'securely up in place.

By pulling down on the cord i, the catch may be disengaged from the hook f, and the sash allowed to descend.

` On the upper side of the lower sash is located a standard, or bracket, E, in the upper end of which is mounted a shaft, provided, on -the inner end, with a crank, a, and on the opposite end with a head, or disk, D, which has formed on its outer face a projecting spiral thread, as shown in gs. l and 3, which thread engages with the teeth on the rack C, as shown in iig. 1, so that by turning the crank, the disk will be revolved, and its thread taking hold in the rack, will cause the disk to rise, raising with it, the sash B, or, by reversing the motion of the crank, lowering it in a similar manner.

Thus, it'will be seen, the sash may be quickly and easily raised to any desired height, and held at any point, as there is no tendency of the disk to run back, and thus allow the sash to fall.

If it be desired to lower the upper sash, this device.

again to its highest point, the catch I will automatically.

engage with the head j', and thus secure the sash.

By bringing both sash to their normal positions, and turning the crank, until the threads on the disk bind hard, the windows may be locked, so as to prevent their being raised from the outside, without removing, or breaking the glass.

It is obvious that a cog-pinion to engage with the rack, insteadof the spiral threaded disk may be used, the rac-k being also modified in detail.

It will be observed that the crank-shaft stands at right angles across the top of the sash, and is provided, on the outer end, with an ordinary cog, or spur-pinion, G, as clearly shown in iigs. 4 and 5, which engages with the rack F, as shown in igl4. A

This rack is, in cross-section, L-shaped, as seen in iig. 6, and, instead of projecting teeth, has punched through it, .a series of slits, or holes, as shown in iigs. 4 and 6, into which the teeth of the pinion G mesh or enter, and thus when the crank is turned, raise or lower the sash, according to the direction of its revolutiou, the rackbeing secured to the sash, so that the perforated, or toothed portion stands at right angles therewith, as shown in Iig. 4.

Unlike the disk D,- pinion G will not support the sash when the handis removed fromv the crank, -but will allow it to drop, unless means are provided to lock it.

To do this, I pass through the arm of the crank a sliding pin, or bolt, b, and connect with it, on one end,

a spring, d, and pivot to the opposite end, on the outi side of the crank, a cam, c, all as shown in figs. 4 and 5.

When this cam is turned over in one direction, the bolt b is drawn back, as shown by red lines in g. 5, and the crank is free to revolve, but when turned down in theopposite position, the bolt is drawn through by the spring, .and will strike against the standard H, Having thus described my invention,

which supports the crank-shaft, thus preventing the What I claim, is

crank from revolving, and holding,r the sash in what The vertical raokC with hook f, in combination with ever position it may have been at the time the cam catch I and disk D, provided with a spiralthread, all

was turned down. .constructed and arranged substantially as herein de- Thus constructed, I produce a strong, cheap, and scribed, to operate and fasten window-sash.

effective apparatus for operating -WindoW-sash, which DELOSS A. DANFORTH. holds the sash at any desired point, and that a child Witnesses: may operate, and that operates either sash independent S. H. LANG,

ofthe other. B. TURNOGK. 

